Category Archives: Wood

What Can Happen to Unbraced Wood Truss Web Members? Part III

Posted by in Case Studies, Wood | February 25, 2020

So, to continue on from last weeks post. How did we know that the wood trusses had buckled sideways previously and were reset? Examination of the top chord in the featured photograph shows two nails saw off flush with the… Read More

What Can Happen to Unbraced Wood Truss Web Members? Part II

Posted by in Case Studies, Wood | January 27, 2020

So, what happens when the web members of a wood truss are not braced laterally as specified by the truss manufacturer? When a wood truss is designed and constructed by a truss manufacturer, the manufacturer commonly provides drawings that show… Read More

What Can We Tell From These Photos? (Case Study 19)

Posted by in Case Studies, Roof, Simple Forensic Methods, Wood | May 13, 2019

The roof surface exhibits a deep trough near scupper through which the roof drains. The roof runoff can’t drain off the roof until it fills and overflows the trough. The trough has been present for months, as evidenced by the… Read More

What Can We Tell From This Photo? (Case Study 18)

Posted by in Case Studies, Wood | April 29, 2019

One of my favorite sayings is, “When something doesn’t look quite right, it probably isn’t.” This maxim has served me well, both professionally and personally.  Some would probably call it “instinct” or “the subconscious mind.”  Whatever it is called it… Read More

What Happens When… There is a Knot in a Truss Web Member?

Posted by in What happens when ...?, Wood | May 07, 2018

Here we have a truss web member that is fully fractured.  Close examination of the fracture discloses a knot that extends from the top face down to the bottom face, nearly the full width of the member (Figure 1).  The… Read More

A Case Study of the Weathering of Treated Lumber

Posted by in Wood | January 16, 2018

How quickly does treated lumber weather? Here is a photo I took of a picnic table near our office on June 15, 2016   Here is the same table from a similar angle approximately nine months later. The lumber has… Read More

Help!! Anchor Straps

Posted by in Basements, Wood | January 02, 2018

This doesn’t look right, does it? It’s not. The top two straps for the anchor connector for the top of the cast-in-place concrete basement wall were separated, bent flat against the top of the basement wall, wrapped around the sill… Read More

Separation of Wood Truss Plates in a Fire

Posted by in Fire Damage, Wood | September 18, 2017

When examining wood trusses for fire damage there is more to consider than charred members, excessive drying of the lumber, and the release of sap. Here’s a reminder to check the steel plates for separation or loosening.   Disclaimer Read More